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MET233

Phase 1

Obesity and Overweight | Monoclonal antibody | Metabolic |Metsera, Inc.|Last Updated: May 26, 2026

Target and mechanism

ModalityMonoclonal antibody

Also known as MET233 and MET097

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials1
Total Enrollment144

FDA Designations

No designations recorded

Clinical trial landscape

MET233 · 1 trial · 1 indication

Phase 1 1
NCT07022977A Study of MET233 in Individuals With Obesity or OverweightObesity and Overweight
COMPLETED144 Analytics
PHASE1COMPLETED
A Study of MET233 in Individuals With Obesity or Overweight
Obesity and OverweightUnlock trial analytics

Study Endpoints

Primary Endpoints

Occurrence of Treatment Emergent Adverse Events
Part A (Baseline to Day 85), Part B (Baseline to Day 113), Part C (Baseline to Day 162), Part D (Baseline to Day 239)

Secondary Endpoints

Area under the concentration versus time curve extrapolated to infinity (AUCinf)
Part A (Baseline to Day 85)
Area under the concentration versus time curve during the dosing interval (AUCtau)
Part B (Baseline to Day 113), Part C (Baseline to Day 162), Part D (Baseline to Day 239)
Maximum observed concentration (Cmax)
Part A (Baseline to Day 85), Part B (Baseline to Day 113), Part C (Baseline to Day 162), Part D (Baseline to Day 239)
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
(Part A) MET233EXPERIMENTALParticipants will receive a single dose of MET233 at up to 5 dose levels
(Part A) PlaceboPLACEBO_COMPARATORParticipants will receive a single dose of placebo
(Part B) MET233EXPERIMENTALParticipants will receive five weekly doses of MET233 at up to 4 dose levels
(Part B) PlaceboPLACEBO_COMPARATORParticipants will receive five weekly doses of placebo
(Part C) MET233EXPERIMENTALParticipants will receive twelve weekly doses of MET233 at up to 4 dose levels, followed by a 13th potential monthly dose
(Part C) PlaceboPLACEBO_COMPARATORParticipants will receive twelve weekly doses of placebo, followed by a 13th potential monthly dose
(Part D) MET233EXPERIMENTALParticipants will receive twelve weekly doses of MET233, followed by three monthly doses.
(Part D) PlaceboPLACEBO_COMPARATORParticipants will receive twelve weekly doses of placebo, followed by three monthly doses.

Interventions

NameTypeDescription
MET233BIOLOGICALFor subcutaneous administration
PlaceboBIOLOGICALSterile 0.9% (w/v) saline for subcutaneous administration
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Eligibility Criteria

Age Range18 Years to 70 Years
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: * Adult (≥18 to ≤70 years) male and female participants with obesity or overweight (BMI 27.0 kg/m2 to 38.0 kg/m2, inclusive) but otherwise healthy. Exclusion Criteria: * Female who is lactating or who is pregnant according to the pregnancy test at the Screening visit or prior ...

Countries:United States
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Recent Changes (Last 90 Days)

MEDIUMJun 26, 2026NCT07022977TRIAL_REMOVED: changed
MEDIUMJun 26, 2026NCT07022977TRIAL_REMOVED: changed
MEDIUMJun 26, 2026NCT07022977TRIAL_REMOVED: changed

Frequently asked questions about MET233

What is MET233 used for?

MET233 is an investigational monoclonal antibody being developed for obesity and obesity-related medical conditions, as well as for obesity and overweight. It is currently in Phase 1 clinical development and is not yet approved by regulatory authorities.

How does MET233 work?

MET233 is a monoclonal antibody, a type of biologic designed to target specific molecules in the body. However, its precise molecular target has not been disclosed in available information, so its exact mechanism of action is not publicly detailed.

Who is developing MET233?

MET233 is being developed by Metsera, Inc., a biopharmaceutical company publicly traded under the ticker symbol MTSR. The company is conducting clinical trials to evaluate the drug's safety and efficacy in individuals with obesity or overweight.

What phase is MET233 in?

MET233 is in Phase 1 clinical development. It is an investigational drug, meaning it has not been approved by the FDA or other regulatory bodies. The ongoing Phase 1 trials are designed to assess safety, tolerability, and preliminary efficacy.

What clinical trials is MET233 in?

MET233 is being studied in two Phase 1 clinical trials. One trial, NCT06924320, is recruiting and evaluates MET233 in combination with MET097 in individuals with obesity or overweight with or without diabetes. Another trial, NCT07022977, has been completed and studied MET233 alone in individuals with obesity or overweight.

Is MET233 the same as MET097?

MET233 is not the same as MET097. MET233 is a separate investigational monoclonal antibody, while MET097 is a different drug candidate. They are being studied together in a combination trial, but they are distinct therapeutic agents.